Pocket pressure test-gage.



F. SGHUBERT.

POCKET PRESSURE TEST GAGE.

'APPLIGATION FILED SEPT. 29, 1910.

Patented June 13, 1911.

WITNESSES:

AT'ORN EY Be-it.known that I, Fnennnion I a citizen ofEtheUnited States, and resident I off-:Sellersville, in the county of Bucks and- 5 State}, of Pennsylvania, have invented cer 5 g tai'ri newand u'sefiulImprovements in Pocket Pressure Test-Gages, of which the following aspecification. .:Th1s-inv ention relates toipocket ressure test gages for pneumatic tires-and ot erpurposes,;;,and has. for ,itsobjeet to produce agage 1n a manner as hereinafter; set forth, whe'reb' .a small convenient. (leV1ee,;lS-. .pI Or duce'd or quickly ascertaining the maximum.

1 5 pressure of a pneumatimtireand the like,

sibil'ityof getting a false reading, J

A furtherph'ectjof h device is to L-aiito';

' without loss of air. and' withoutlthe Ipo s pre sure ihasbe nno j d,

omsa 'constructiongcombinatmnand arran emen't 2.5 of arts as hereinafter. more spec fics. ly described-and illustrated in the accompanying;

drawings wherein is ifshoyvn{-t ejfpref 'erred a embodiment of the invent on, 1) t1t"is't o;be

, v understood. that; ehangesjvaria'tions and modifications can beresortedito' wh chcoine within the scope of thejcIairnsl ereunto appendeth In the drawings, whereinnlike' reference Qhar r ea t s r spo d g p r in 85 several views; Figure 1 is a front elevation,

- the gglass and, rim being rer noved, thedial broken'awa in part, and the .frar'ne for the movement ing 'shownin' parthydotted.

- lines for clearness of illustration: the socket is shown in center 'section.- Fig.2, is'a cross sectional view on dot and'.dash.1ine"2'.'-2 of Fig. Fig. 3 shows part of the movement in ainverted .gposition when the weight returns the sector. and hand to zero. Fig. 4

.45 is part of the inovement and a modified weight, in a normal position. -Fig. is. an

inverted view of lfig, 4 showing the sition of the weight whenthe-gsector and and is returned to zero, and Fig; 6 is an edge view Q of the weighted lever shownin- ,fl' and 3.-.

For convenience in carrying, t eE-gage is -i nclosed in a case, 1, similar in size and aparanoe to the electrical pocket meters used- 4 y electricians to quickly meter the voltage 5 or amperage of'an electriccurrent, the com-,-

pletecas'e comprising the glass cover, Zglass...

o h rtain. View, the invention consists. of. the hov'el Specification of {letters Paten t. Patented June 13, 1911, fja ndat enaleki s eets 29,1910. Serial'No. 584,459.

and knob, 6." 'The ring 4: is pivoted in the stud as usual, and the knob and stud may be of one piece, for the reason that it is only used to press the case down upon a tire niptothe knob. The dial, 8, is held in position in any preferred manner. The movement proper may be completely mounted on a base plate, 9. A Bourdon-tube spring, 10, is fastened to the lower part of the case, where it'communicates with a hollow pin, 11, being centrally situated within the socket, 7, which socket is provided with a soft rubber lining, l2, slightly tapered, to adapt it to slip over free'lend of the, Bourdon-tube spring is capped, a book, 13, being preferably soldered ator 'rie a'r the end as shown. I

The-movement consists of a bearing'frame,

balancedisector, l6, are journaled; this frame whereby a space is provided to permit-tho lever, 19 to enter between them, as is shown .by dotted lines in Fig. 1. Thesector'has teeth, 20, on the periphery'of the are, as usual, which engage a pinion, 21.' The free 'end of the sector, 22, is curved, and has a slot, 23, in which a stud, 24, is adjustably mounted; this stud is engaged by the hook,

13, and is carried forward only in one direction when'pressure within the Bourdontube spring acts on it, the increased diameter being shown'by dotted circles, and theposition of the sector being likewise shown by dotted lines in F ig. 1. "The weighted lever, 19', is also mounted on the base plate by a ,rivetor screw, 25,- as above described; at a proper point a finger, 26,'is bent upward so as to engage the side of the sector. A pin, 32, limits downward movement of the lever. A friction'sprin g, 27, may be used to press against thepinion shaft, the pointer or indiand refers only to the weight, the other part o he. v me be ng den i al y as derim- 2, back cover, 3, ring, 4:, ring stud, 5,,

ple, as thesocket, 7, is diametrically opposite entering the gage, when carried in the rn nnnnrcirsciiuenn'ri ,or'--snLLEnsv rLnn,. Pian'NsYnvAmn. f

any standard tire nipplenot shown! The 14',- in} which the piniom'shaft, 15, and the is preferably'mountedon two posts, 17 18, v

weight 19," which is fastened to an oscillating l cator, 28, being mounted on said shaft: the ointer is broken --away for clearness' of scribed. In the modification a' post, 29, 'isp the lower part .of the case' 'upon which et a weight, so, slides: this weight is prel'erably cylindrical in shape and is provided with a fine hole, 30, to break any vacuum therein, and to cause weight to act quickly and without any check. This weight strikes the sector, as shown in Fig. 5, to return the indicator and movement to zero. Fig. 4 shows the weight in a normal position, to permit free movementof sector when taking a reading of the pressure.

Such being theconstruct-ion, the operation is as follows :-To ascertain the pressure within a pneumatic tire, the gage is pressed down tightly over the nipple, the pin, 11, opening the valve and letting the air enter up through the pin into the Bourdon-tube spring, which distends according to the pres sure, friction of the spring 27, against the pinion shaft, 28, tending to hold the pointer at the maximum point. The gage is removed and the pressure indicated by the pointer and dial, is noted. If the testing is done in a dark place, as is quite usual, the gage can be taken to the light and the reading noted, it being only required that the gage be handled in a vertical position, same as when the testing was done. In testing the hook pulls the sector only in one direca socket at its lower end, saidsocket being lined with a flexible material, a hollow in in said socket, a Bourdon-tube spring BIS- tened to said case, said Bourdon-tube sprin having a communication with said pin and socket, a hook on the free end of said Bourdon-tube spring adapted to engage a stud mounted on the free end of a sector, said sector, a pinion mounted upon a inion shaft and engaging said sector, an in icator surmounting said pinion shaft, a dial upon which the indicator shows the pressure and means for setting said sector and indicator to zero, said means compnsmgaweight acting on said sector only when the gage is inverted.

2. In' a pocket pressure gage for pneu-' matic tires, a case provided with. a socket on case, said pinion engaging'said sector, a"

its periphery, said socket being adapted to .means for effecting an operative connection between said pin and said spring'fa movement comprising a'sector, a pinion and pub 1on shaft mounted in a frame within said pointer mounted on said pinion shaft,"- a dial upon which the pointer indicates the? pressure,-a means on the free end' oisaid Bo'urdo'n-tube spring for engaging the free end of said sector, and operative 1none di rection only, when pressure is applied in said, Bourdon-tube spring, and means forsetting? said sector to zero, said means comprising weight acting on said sector only when gage is inverted. y

3. In'a pocket; pressure gagejfor pneu 8v iuatic tires, acase provided on the lowerp' riphery with a socket adapted to Sll'llllllifiIlEr ously open a tire valve andmake an airtight joint between said case and a tire'nipnle,- a Bourdon-tube springfastened in ear case and having .a communication with" said socket, a movement mounted in said case,

said movement comprising a frame, a. sector, a pinion mounted on a pinion shaft and engaging said sector, an indicator mounted on said pliiion shaft, a. dial upon which the indicator shows'thepressure, means on the free end of said Bourdon tube spring for engaging the free end of said sector only when pressure is applied tosaid Bourdontube spring, and a weighted lever adapted to operate said sector only when the gage is inverted.

4. In a pocket pressure gage for pne u matic' tires, 9. case provided with means for connecting with a pneumatic tire, a move ment in said case comprising a Bourdontube spring, having a communication with said connecting means,- a movement mounted in said case comprising a sector, a pinion, we mounted on a pinion-shaft surmounted by a pointer, saidpinion engaging said sector, a dial uponewhich the pointer indicates the pressure, a means on the free end of said Bourdon-tube spring for operating said sec tor in one direction only, and a Weighted means for operating said sector in one direction only when the gage is inverted.

Signed-at Sellersville' in the county of Bucksand Stateof Pennsylvania this 27th day of September A. D. 1910.

FREDERICK SCHUBERT. Witnesses: I

RICHARD WERCHAN, ROBERT Tnoiims. 

